#12982: Missed constant folding oportunities -------------------------------------+------------------------------------- Reporter: erikd | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: libraries/hoopl | Version: 8.0.1 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Vyse007): I took a stab at this: thanks to Ben I was able to add a new {{{ PrimOp}}} for POW, along with some basic rules for folding in {{{ PrelRules.hs}}}. I eventually found myself stuck in {{{nativeGen/X86/CodeGen.hs}}} where we employ {{{getRegister}}} to find free registers for computation. I couldn't grok all of it so for I just copied the {{{triv_op}}} call for {{{MO_Mul}}} and it seemed to work fine; I understand that it's incorrect obviously, but I might need a little help in understanding what's the best solution. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12982#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler